Cotter-pin puller.



G.'A. BERG.

CUTTER PIN FULLER. APPLICATION FILED JUNE 30-1915.

Patented Apr. 29,1919.

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GUSTAE ll. BERG, OF CHICAGO, ILLINOIEL CUTTER-PIN FULLER.

Specification of Letters Patent.

Patented Apr. as, role.

Application filed June 30, 1915. Serial No. 37,189.

This invention relates to a novel tool designed more especially forremoving cotter pins from their seats in various kinds of machinery. andalso adapted to spread the members of the cotter pin atter it has beeninserted in its seat.

The object of the invention is to provide an exceedingly simple tool forthis purpose which may be produced at small cost and which is light tohandle. V

A further object of the invention is to provide a tool for this purposewhich may be used in close work or work where the cot ter pin or otherpart to be manipulated lies very closely adjacent to the surroundingparts of the machine or device so as to preclude the use of pliers orlike 'ices' for pulling or prying the cotter pin out of place.

A further object of the. invention is to provide, in a compact and lighttool. means for exerting heavy hammer thrusts on the cotter pin or thelike.

The invention consists in the combination and arrangementof the partsshown in the drawings and described in the specification.

Tn the drawings:

. Figure l is a side elevation of a tool embodying my invention showingthe handle in full and dotted lines in two positions which it assumes inits use. I

Fig. 2 is a cross section through the hammer and shank of the tool.

Fig. 3 is a fragmentary perspective view illustrating the manner ofapplying the tool to a cotter pin to remove same.

Fig. 4. is a similar view illustrating the manner of spreading themembers of the cot ter pin. after said pin has been seated.

The tool herein shown embodying my invention embraces an elongated shank10 provided-at one end with 2. turned over portion or hook 11 andprovided at its other end with a head 12. The said shank may be made ofsteel or other metal possessin the required strength and durability anthe head 12 may be formed on the shank 'by an lip-setting operation ormay be separately made and fixed to the shank, as desired 14 designatesa handle which is slidable on the shank 10 between the hooked end 11 andthe head 12. Said handle preferably has the form of an elongated tubularhand piece, with the axial opening 15 thereof of a size to fit looselyover the shank, so that it may slip easily thereover in the direction ofthe axis of the shank. The hand piece may be grooved or otherwiseroughened to enable it to be manipulated by the hand without slipping.It may he made of east or malleable iron or other material of suitableweight and hardness to act as a hammer.

The said handle is fitted to the shank so as to be non-rotative thereonwhereby the pointed end of the tool may he. directed to the work bygrasping the hand piece, the shank being capable of being turned withthe handle by reason of the non-rotative engagement of the handletherewith. As herein shown this non-rotative engagen-ient ot' the handlewith the shank consists in making the shank polygonal in cross section(square as herein shown) and by making the axial opening of the handleof like cross section and. as before stated, of somewhat largerdiameter. than the external diameter of the h k. Obviously suchnon-rotative engagement between the handle and shank may he efl'ected invarious ways as. for instance. by means of a key and key way or byflattening a rbund or oval shank and correspondingly forming the openingin the handle.

,The turned over r hooked portion ll of the tool is preterahiy arrangedat an angle to the shank slighllyless than a right an-- draw largercotter pins. By reason of the 'mented by turning the its, the

fact that the handle is non-rotatirely engagged With the shank of thetool the cotter pin, after being engaged by the hook may be turned inits seat to facilitate the with draWal of said pin. In forming the hookthe end of the shank may be pointed by a suitably shaped tool.Thereafter the handie is slipped over t 1e shank and finally the, hookis turned down to the position shown in Fig. 1, as for instance, by theaid of a suitable bending die.

The operation of the tool to Withdraw a cotter pin is illustrated inFig. When the hooked end of the tool is engaged Witlr the eye of thecotter pin the handle is shift-- ed toward the cotter pin and thereafteris forced against the head 12 so as to produce a hammer thrust on thecotter pin to With-- draw it from its seat. As before stated, the hammeraction of the tool may be supple cotter pin in its seat to close theseparated or spread members oil? the pin to permit the pin to beWithdrawn from the opening in which it is seated.

By reason of the fact that the entire tool may be directed by the handwhich grasps the handle, theoperation of Withdmwinp; the cotter pin maybe readily ell'ected by a Single hand of thepersou using the tool. yreason of the further fact that the ad Vance or hooked end of the toolis small, said tool may be inserted into places difficult of access totools heretofore used in Withdrawing cotter pins and like devices In Fig. 4 is shovn the manner in which the members of the cotter pin may beopened after the pin has been inserted into its seat. This openingoperation is facili tated, as will be obvious, by sharply pointing theend of the hook, whereby it may be readily inserted between the membersof the pin to spread them.

It will be understood that the invention is capable of some variationsfrom the illus trated embodiment shown a d described within the spiritrod member having a hook formed at one end'for engagement with the eyeof a cotter pin and having an abutment formed at the other end, and animpact member through which the rod member passes and which is movablelongitudinally from said abutment to the hooked end, whereby a cotterpin may be inserted by successive impacts upon its head or Withdrawn bysuccessive impacts against the abutment.

2. A cotter pin prising an elongated shank provided at one end With ahead and at its other end With a hook and a member having an openingloosely and nonrotatively fit over said shank to constitute a ha minercussi e force on the-head to attest the Withdrawal of a cotter pin, andto also constitute a hand piece to direct the tool and to rotate theshank and hook. v 1

3. A cotter pin puller and spreader com prising an elongated shankprovided at one end with a head and at. its other end With a hook and amember having; an opening to loosely and non-rotatively fit over saidshank to constitute a hammer to exert percussive force on the head toeffect the Withdrawal of a cotter pin, and to also constitute a handpiece to direct the tool and to rotate the shank and hook, said hookbeing disposed at an acute angle to the shank and being pointed at itsend and gradually enlarged toward its junction With the shank.

In testin'iony that I claim the foregoing as my invention I a x mysignature in the presence of two Witnesses, this 525th day oi June, A.D. 1915.

GUSTAF A. BERT V fltnesses W. l1. HALL, G. E. Dower.

puller and spreader'comi to exert per-

